XR17D154 Datasheet, PDF (9/69 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART

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REV. 1.2.0
XR17D154
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
FIGURE 4. TYPICAL APPLICATIONS IN AN EMBEDDED SYSTEM
Example 1
VIO = 3.3V, VCC = 5V
VIO = 3.3V
CLK
(up to 33.34MHz)
PCI
Local
Bus
Interface
UART Core Logic
UART Channel 0
UART Channel 1
UART Channel 2
UART Channel 3
VCC = 5V
Example 2
VIO = 5V, VCC = 5V
Max Crystal Frequency = 24MHz
Max External Clock = 50MHz
VIO = 5V
CLK
(up to 33.34MHz)
PCI
Local
Bus
Interface
UART Core Logic
UART Channel 0
UART Channel 1
UART Channel 2
UART Channel 3
VCC = 5V
Example 3
VIO = 3.3V, VCC = 3.3V
Max Crystal Frequency = 24MHz
Max External Clock = 50MHz
VIO = 3.3V
CLK
(up to 33.34MHz)
PCI
Local
Bus
Interface
UART Core Logic
UART Channel 0
UART Channel 1
UART Channel 2
UART Channel 3
VCC = 3.3V
Max Crystal Frequency = 24MHz
Max External Clock = 33MHz
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